高墩大跨连续刚构桥极限承载力与抗风性能分析

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1、AbstractWiththespanofthecontinuousrigidframebridgesbecominglongerandthepierbecominghigher,itismuchmoreimportanttopayattentiontothestabilityandwind—resistantperformanceofthem．TakingtheWenmingBridgeandShandianjiangBridgeinRuchenHighwayasthebackgroundengineerings

2、，thestabilityandwind—resistantbehaviorwerestudiedinthispaper,whicharecomposedofthefollowingsixaspects．(1)ByuseofthefiniteelementprogramMidas-civil，thefirst—orderlinearstabilitiesinrepresentativeworkconditions，suchasthehighestpier,themaximumcantileverandthefulf

3、illedbridgeconditionofthetwobridges，wereanalysed．(2)ByuesofthefiniteelementprogramMidas—civilandwiththeeffectoftheinitialimperfectiontakenintoaccount，thegeometricalnonlinearitystabilitiesatthemaximumcantaleverstagewereanalysedtodiscusstheeffectofthegeometrical

4、nonlinearitytothestability．(3)ByuseofthefiniteelementprogramMidas—FEA，thegeometricalandmaterialnonlinearitystabilitiesatthemaximumcantaleverstagewereanalysed．Theresultsshowthattheeffectofmaterialnonlinearityinthestabilityanalysismustbeconsideredinordertoreveal

5、theultimatebearingcapacityofthestructure．(4)ByuseoftheFluentsoftware，theaerostaticcoefficientsofthesinglegirdercross—sectionofShandianjiangBridgewerecalculatedandtheeffectofdifferentfactorstoaerostaticcoe衔cientswerediscussedinthispaper．(5)Basedontheresultofthe

6、aerostaticcoefficients，thispapermadeapreliminarystudyongallopingstability,flutterstability,vortex—inducedvibrationandtheinternalforcesinducedbywindloads．(6)Additionally,theaerodynamicinterferenceeffectonaerostaticcoefficientsofadouble-deckbridgewithdifferentbr

7、idgedistanceandwindattackswerestudiedinthispaper．KEYWORDShighpier,large-span，continuousrigidframebridges，nonlinearity,stability,aerostaticcoefficients，aerodynamicinterference1Ii硕士学位论文目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．j⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯l1．1连续刚构桥的运用与发展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．11．2高

8、墩的运用与发展⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯一21．3问题的提出⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．3．1稳定性问题⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．41．3．2抗风问题⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．41．4研究的历史概况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．．51．4．1稳定问题的